ieviic

So, I have this weird problem. The thing is, when I connect my phone to computer through USB, there are 6 folders - MUSIC, TEXT, Photos, Videos, Other and finally something called ÖÖÖÖÖÖÖÖ.Ö. I cannot delete that folder! "Cannot delete file" and so all the time. Inside the folder are the same folders like the one at beginning. Like, in every "ÖÖÖÖÖÖÖÖ.Ö" folder there are these 6 folders, and in the next one there still are those 6. It may look like G:\My media\ÖÖÖÖÖÖÖÖ.Ö\ÖÖÖÖÖÖÖÖ.Ö\ÖÖÖÖÖÖÖÖ.Ö\ÖÖÖÖÖÖÖÖ.Ö\ ÖÖÖÖÖÖÖÖ.Ö only it's possible to go damn far. I've opened them until the last one, but that doesn't change anything - still impossible to delete something. The thing is, inside every ÖÖÖÖÖÖÖÖ.Ö folder is a Music folder, inside which are mp3 songs, that i cannot delete too. Some of these Music folders take 0 bytes, some of them like 50 MB. So i haven't got any Megabytes left free. And if I manage to put new music in Music map, sometimes the phone later shows the old titles and mixes the songs together, adds creepy sounds etc. Also, when i copy the new songs into phone, it tends to throw some of the old songs in at the same time, like, with every song that I copy, 2 songs show up, and one of them is from the previous time.
So, any ideas? A virus? If not, what then? Can I fix it?
Sorry about the long text and yeah.also my English